Protests calling on US President Donald Trump to intervene in the ongoing Hong Kong political standoff escalated rapidly Sunday, with marchers setting fire to a barricade outside a subway station entrance in the city’s business district.

Earlier in the day, tens of thousands of protesters waving US flags marched on Hong Kong’s US Consulate to call for help from the Trump administration in ending a three-month confrontation with the government.

The march began in the Chater Garden public park in Central before heading to the consulate as part of the 14th straight weekend of public demonstrations in the Asian financial hub.

In a letter which protesters planned to presented to consulate officials, the group calls for the passing of the proposed “Hong Kong Human Rights and Democracy Act 2019” by the US Congress.

Speaking last week, Hong Kong and Macau Affairs Office spokesman Yang Guang accused US politicians of “shooting their mouths off” on the demonstrations.

‘Most favored nation’ status

US President Donald Trump has shown little inclination to get involved in the Hong Kong protests since they began in June.

In August he said he hoped the demonstrations would eventually work out “for everybody, including China” and that no one gets hurt.

But some US politicians have been pushing for greater US action to help the protesters, with some even pushing for an official re-evaluation of Hong Kong’s “most-favored-nation” trade status with the United States.

That special status gives countries certain trade advantages, including lower tariffs on imported goods, according to the US government.

It’s this act which some protesters are calling on the US Congress to pass to put additional pressure on the Hong Kong government and Beijing to accede to their demands.

The interest US politicians have shown in Hong Kong, including Vice President Mike Pence and the Democrat Party leadership, have led to accusations from China that Washington is behind the three-month long demonstrations.

“It is an open secret in Hong Kong that the forces protesting the extradition bill have been sponsored by the US,” Chinese state-run tabloid Global Times said in an editorial in July. Multiple high-ranking Chinese Foreign Ministry officials have repeated the claim without any proof.

The US State Department responded that Chinese claims of their involvement are “ridiculous.”

Months of protest chaos

Protest organizers say millions of people have taken to the streets of Hong Kong since early June, in protests which evolved from objections to the planned extradition bill into wider calls for greater democracy and civil rights.

Currently, the protest movement has five demands, including an investigation into allegations of police brutality and the release of arrested demonstrators.

On Wednesday, Chief Executive Carrie Lam announced one of the protesters’ demands would be met by withdrawing the extradition bill from the local parliament.

But so far the government has refused to meet any of the other demands.

Despite the withdrawal by Lam, there have been clashes between police and protesters every night in the past week.

Much of the action has focused on the streets around Prince Edward subway station, in the residential and commercial hub of Mong Kok, where video from Sunday night showed police officers chasing down and forcefully arresting protesters.

Demonstrators at Sunday’s march said that they’re not going to back down until all their demands are met. “It’s just like going to work,” 64-year-old protester Felix Wu said, laughing.